The worldwide average salinity of seawater is
A) 5‰. B) 35‰. C) 45‰. D) 55‰. E) 75‰.
B
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Where in the world is biomass used as the primary energy source?
A. China B. More-developed countries C. Africa D. The United States E. The poorest countries
Which of the following contributes most to sustainability?
A. Abundant use of resources B. Distribution of poverty C. Rapid population growth D. Inclusion of environmental and health costs in market prices E. Natural capital degradation
The glaciated part of a thunderstorm is usually found at
A) the top of the storm. B) the middle of the storm. C) the bottom of the storm. D) throughout the entire storm.
Which feature is responsible for 90% of the Earth's volcanic activity?
A. Continental rise B. Oceanic trenches C. Oceanic ridges D. Continental shelf E. Abyssal plain